Structure and luminescent properties of Sm³⁺ doped SrO-MgO-SiO₂ glass ceramics

Abstract

A new type of samarium ion activated luminescent glass ceramics with main crystal phase of melilite was prepared. The effect of heat-treatment temperature on the structure of glass ceramics was investigated by X-ray diffraction analysis (XRD), scanning electron microscope (SEM) and fluorescence spectrometer. In the Sm³⁺ doped SrO-MgO-SiO₂ glass ceramic, its excitation spectra are in the wavelength range of 350–500 nm, and its excitation peaks are at 360 nm, 374 nm, 404 nm, 417 nm, and 475 nm with the host excitation peak of 404 nm, showing a strong orange-red luminescence when using 404 nm violet to excite it, and its emission peaks are at 564 nm, 600 nm and 648 nm with the host emission peak at 600 nm. The increase in the heat-treatment temperature has no influence on the position of the fluorescent spectra. However, with the increase of heat-treatment temperature, the intensity of fluorescence spectrum shows an increasing tendency. The increase in the concentration of Sm³⁺ also improves the intensity of the fluorescent spectra. In the experimental concentration range (0.05mol%–0.30mol%), a special concentration quenching phenomenon happens.

Keywords

glass ceramics / rare earth / luminescence

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